Abstract: MRI apparatus include coil systems for generating magnetic fields. These coil systems require currents of some hundreds of A and voltages as high as some kV. Furthermore, weak and noise-sensitive signals must be detected in such apparatus; therefore, the measuring space of the apparatus is accommodated in a Faraday cage, but another part of the equipment of the MRI apparatus is arranged outside said cage. Therefore, power signals as well as data signals must be fed through II filters in the wall of the Faraday cage; thus far, such feeding through took place via one type of filter. In accordance with the invention, two filter elements are used, i.e. one filter element for the power conductors which comprises only one filter and one filter element for the data conductors which comprises several filters. The latter filter element is preferably provided with capacitors which are integrated in the connectors which are mounted on a PC board.

Abstract: A magnetic resonance apparatus includes a magnet system (2) for generating a steady magnetic field (H) in a measuring space (28), an RF receiver circuit (10, 14, 16) with an RF receiver coil (10) for receiving RF signals emitted by an object arranged in the measuring space, a monitor (22) with a liquid crystal display (LCD) display screen (44) for image display, and a central control unit (18) which is connected to the RF receiver circuit and to the monitor for control in such a manner that information is applied to the LCD display screen. In order to prevent disturbing RF signals, produced by the monitor (22), from affecting the information obtained via the RF receiver circuit (10, 14, 16), the central control unit (18) is arranged to control the monitor in such a manner that information is applied to the LCD display screen (44) only during periods in which the RF receiver circuit is not activated.